Champion 25 Spark Plug

Reliable Ignition Performance for Classic and Modern Vehicles

The Champion Copper Plus 25 spark plug is engineered to deliver consistent ignition and efficient combustion for a wide range of vehicles including Buick, Chevrolet, Ford, and Pontiac models. Designed with durable nickel and copper alloy materials, this spark plug supports reliable engine starts and smooth operation.

• Ground electrode core made of nickel for durability
• Nickel center electrode tip for stable spark delivery
• Pre-set gap size of 0.035 inches for optimal ignition
• Resistor type spark plug to reduce electrical interference
• Tapered seat type ensuring secure fit and proper sealing
• Thread diameter of 14 mm (0.551 inch) with 0.441 inch reach
• Hex size of 15.88 mm (0.625 inch) for easy installation
• Compatible with a wide range of GM, Ford, Chrysler, and Dodge vehicles

About the Champion Copper Plus Spark Plug Line

The Copper Plus line from Champion is designed to provide dependable ignition performance by combining a copper core with nickel alloy electrodes. This construction enhances heat dissipation and electrical conductivity, which helps maintain consistent spark and combustion efficiency. The Copper Plus spark plugs are suitable for many domestic vehicles, including classic and late-model cars and trucks, making them a practical choice for routine maintenance and replacement.

Technical Details and Specifications

This Champion Copper Plus spark plug, part number 25, features a single ground electrode made from a nickel copper alloy, paired with a nickel center electrode tip. The insulator height is 0.12 inches with a projection of 0.12 inches, supporting proper spark gap and ignition timing. The plug has a manufacturer heat range rating of 17, suitable for a variety of engine operating conditions. The removable nut electrical terminal type allows for flexible installation options. Its tapered seat ensures a tight seal in the combustion chamber, preventing compression loss.

Applications and Common Issues Addressed

• Restores engine misfire issues in Buick, Chevrolet, and Ford vehicles
• Improves cold start performance for Chrysler and Dodge models
• Reduces spark plug fouling and carbon buildup
• Enhances fuel efficiency by ensuring complete combustion
• Minimizes electrical interference with onboard electronics

Installation Notes and Tips

Before installation, verify the spark plug gap is set to the recommended 0.035 inches. Use a torque wrench to tighten the spark plug to manufacturer specifications to avoid damage to the tapered seat. The 15.88 mm hex size allows for standard spark plug socket compatibility. Ensure the electrical terminal nut is securely fastened for proper connection. This spark plug is compatible with various models such as the Chevrolet Camaro, Ford Mustang, and Pontiac Firebird, among others.

Quality Assurance and Warranty

Champion Copper Plus spark plugs are manufactured to meet OEM standards for fit, form, and function. The use of nickel and copper alloy materials supports long service life and consistent performance. While specific warranty details may vary, Champion products typically come with a limited warranty against manufacturing defects, providing confidence in product reliability.